An investigation was made of the interaction between a uniformly sub-sonic moving screw dislocation and interface cracks in 2 dissimilar anisotropic materials. Using Riemann–Schwarz’s symmetry principle integrated with the analysis singularity of complex functions, the general elastic solutions of this problem and closed-form solutions for interfaces containing 1 and 2 cracks were presented. The expressions of stress intensity factors at the crack tips and image force acting on moving dislocation were derived explicitly. The results showed that the stress intensity factors at the crack tips decrease with increasing velocity of dislocation, and larger dislocation velocity led to the equilibrium position of dislocation leaving from crack tips. The presented solutions subsumed previously known results as special cases.

Uniformly Moving Screw Dislocation Interacting with Interface Cracks in Anisotropic Biomaterials. B.Li, Y.W.Liu, Q.H.Fang: International Journal of Solids and Structures, 2007, 44[11-12], 4206-19